612121689 has 24 divisors (see below), whose sum is σ = 934096800. Its totient is φ = 385197120.

The previous prime is 612121681. The next prime is 612121723. The reversal of 612121689 is 986121216.

612121689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 612121689 - 2³ = 612121681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (612121681) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41682 + ... + 54420.

It is an arithmetic number, because the mean of its divisors is an integer number (38920700).

Almost surely, 2^612121689 is an apocalyptic number.

It is an amenable number.

612121689 is a deficient number, since it is larger than the sum of its proper divisors (321975111).

612121689 is a wasteful number, since it uses less digits than its factorization.

612121689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13045 (or 13042 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 612121689 is about 24741.0931245974. The cubic root of 612121689 is about 849.0747435934.

The spelling of 612121689 in words is "six hundred twelve million, one hundred twenty-one thousand, six hundred eighty-nine".